client: diagram-template: improve diagramlegend element (AvailableFairwayDepth) * make values and styles of diagramlegend dynamic * adjust positioning and size * use rounded rectangular for diagramlegend element

# documentation
**/README*
**/docs
**/*.md

# backend binary
cmd/gemma/gemma

# Dependency directories
**/node_modules

# local dotenv environment variables file
client/.env.local

# Tags tables
**/TAGS